23,529 / 23 round to a one digit arthimatic fact estimate the quotient:i really need help

When rates are expressed as a quantity of 1, such as 2 feet per second or 5 miles per hour, they are called unit rates. if you have a multiple-unit rate such as 120 students for every 3 buses, and want to find the single-unit rate, write a ratio equal to the multiple-unit rate with 1 as the second term.

You need to do x2-x1,y2-y1 and divide it by 2 and you should get (1,-3)